Ive had both engines, currently have the 177. There isnt a great deal between the two, although the 177 seems to have more torque midrange/topend. Went a little over the speed limit yesterday with ease, the 163 never seemed to have that urgency at the upper limits? Its only done 2500 miles so still needs some running in?
Id agree with the others, get a 163 and chip it.
On a different note, drove the A3 S Line 170bhp recently, miles faster than the 163 E90. Did a rolling run comparison with my colleague's A3 against my 163 onto motorway sliproad, and I didnt have a chance, he was gone!!
Quite a shock it was that much faster!!!???